Seriously, is it? I always hear these horror stories about how heavy certain camera and lens combinations are. I carry around a D300 with either a 300mmF4 or 70-200 attached to it for 4 or 5 hours at a time. Not a big deal. Today I saw a guy at work who had my dream lens, the 200-400F4 attached to a D3. When I asked him if it was as heavy as everyone said it was, he handed it over to me and let me hold it. Again, I wasn't that impressed with the weight. I could easily carry that around on my D300 for hours on end.
Gear just doesn't seem all that heavy to me. Am I just weird?